1231101330320 has 80 divisors (see below), whose sum is σ = 2866357791360. Its totient is φ = 491744796672.

The previous prime is 1231101330293. The next prime is 1231101330341. The reversal of 1231101330320 is 230331011321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1231101330320² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1231101330292 and 1231101330301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251088989 + ... + 251093891.

It is an arithmetic number, because the mean of its divisors is an integer number (35829472392).

Almost surely, 2^{1231101330320} is an apocalyptic number.

1231101330320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231101330320 is an abundant number, since it is smaller than the sum of its proper divisors (1635256461040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231101330320 is a wasteful number, since it uses less digits than its factorization.

1231101330320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8712 (or 8706 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1231101330320 its reverse (230331011321), we get a palindrome (1461432341641).

The spelling of 1231101330320 in words is "one trillion, two hundred thirty-one billion, one hundred one million, three hundred thirty thousand, three hundred twenty".